pointer

Question

pls explain why option d is wrong ?

Comments

#include<stdio.h>
int main()
{
    int a = 10;
    void *ptr = &a;
    printf("%d", sizeof(ptr));
    return 0;
}
output =8

how ?

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size of pointer is depend on machine /compiler.

size of pointer is  is equal to sizeof(int),

wht is correct approach ?

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conventionally sizeof every pointer(including void pointer) is equal to the sizeof largest primitive data type in that system..

since largest primitive data type is double and sizeof(double)=8 bytes....therefore sizeof any pointer(including void) will be  8.

in your above qsn all options are incorrect..

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any reference ?

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https://stackoverflow.com/questions/3520059/does-the-size-of-pointers-vary-in-c

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@joshi_nitish

According to this the size of a pointer is platform dependent

Pointer is a memory address - and hence should be the same on a specific machine. 32 bit machine => 4Bytes, 64 bit => 8 Bytes. Hence irrespective of the datatype of the thing that the pointer is pointing to, the size of a pointer on a specific machine would be the same

but again my doubt is in this case why option c right ?

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See this:

https://stackoverflow.com/questions/3853312/sizeof-void-pointer